930727fre opened a new issue, #17696:
URL: https://github.com/apache/tvm/issues/17696
### Expected behavior
TVM should successfully compile and link `libtvm.so` without missing
`-lxml2`.
### Actual behavior
The build fails with a linker error stating that `-lxml2` cannot be found:
```bash
[100%] Building CXX object
CMakeFiles/tvm_objs.dir/src/target/llvm/llvm_instance.cc.o
[100%] Building CXX object
CMakeFiles/tvm_objs.dir/src/target/llvm/llvm_module.cc.o
/home/fre930727/tvm/src/target/tag.cc: In function ‘void
__static_initialization_and_destruction_0(int, int)’:
/home/fre930727/tvm/src/target/tag.cc:462:1: note: variable tracking size
limit exceeded with ‘-fvar-tracking-assignments’, retrying without
462 | } // namespace tvm
| ^
[100%] Built target tvm_objs
[100%] Linking CXX shared library libtvm.so
[100%] Linking CXX shared library libtvm_allvisible.so
/usr/bin/ld: cannot find -lxml2: /usr/bin/ld: cannot find -lxml2: No such
file or directory
No such file or directory
collect2: error: ld returned 1 exit status
collect2: error: ld returned 1 exit status
gmake[2]: *** [CMakeFiles/tvm.dir/build.make:1408: libtvm.so] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:208: CMakeFiles/tvm.dir/all] Error 2
gmake[1]: *** Waiting for unfinished jobs....
gmake[2]: *** [CMakeFiles/tvm_allvisible.dir/build.make:1408:
libtvm_allvisible.so] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:309: CMakeFiles/tvm_allvisible.dir/all]
Error 2
gmake: *** [Makefile:136: all] Error 2
```
### Environment
- **OS:** Ubuntu 22.04 (WSL2)
- **CPU:** Intel i5-12400
- **TVM Version:** 12e72c29e877bced07f4d0cb5a0861e92cddb38c
### Steps to reproduce
1. Follow the instructions in the [[TVM installation
guide](https://tvm.apache.org/docs/install/from_source.html)](https://tvm.apache.org/docs/install/from_source.html).
2. Execute the following shell script:
```bash
# make sure to start with a fresh environment
conda env remove -n tvm-build-venv
# create the conda environment with build dependency
conda create -n tvm-build-venv -c conda-forge \
"llvmdev>=15" \
"cmake>=3.24" \
git \
python=3.11
# enter the build environment
conda activate tvm-build-venv
```
```bash
git clone --recursive https://github.com/apache/tvm tvm
```
```bash
cd tvm
rm -rf build && mkdir build && cd build
# Specify the build configuration via CMake options
cp ../cmake/config.cmake .
```
```bash
# controls default compilation flags (Candidates: Release, Debug,
RelWithDebInfo)
echo "set(CMAKE_BUILD_TYPE RelWithDebInfo)" >> config.cmake
# LLVM is a must dependency for compiler end
echo "set(USE_LLVM \"llvm-config --ignore-libllvm --link-static\")" >>
config.cmake
echo "set(HIDE_PRIVATE_SYMBOLS ON)" >> config.cmake
# GPU SDKs, turn on if needed
echo "set(USE_CUDA OFF)" >> config.cmake
echo "set(USE_METAL OFF)" >> config.cmake
echo "set(USE_VULKAN OFF)" >> config.cmake
echo "set(USE_OPENCL OFF)" >> config.cmake
# cuBLAS, cuDNN, cutlass support, turn on if needed
echo "set(USE_CUBLAS OFF)" >> config.cmake
echo "set(USE_CUDNN OFF)" >> config.cmake
echo "set(USE_CUTLASS OFF)" >> config.cmake
```
```bash
cmake .. && cmake --build . --parallel $(nproc)
```
3. The build fails with the above linker error.
### Troubleshooting Attempts
- Added debugging options:
```bash
echo "set(CMAKE_BUILD_TYPE Debug)" >> config.cmake
echo "set(USE_ALTERNATIVE_LINKER OFF)" >> config.cmake
echo "set(USE_LIBBACKTRACE On)" >> config.cmake
```
- Installed `libxml2` via Conda:
```bash
conda install -c conda-forge libxml2
```
### Questions
- Is `libxml2` required to be installed via `apt` rather than Conda for TVM
to find it?
- Are there specific CMake flags I should set to properly link against
`libxml2`?
- Any recommendations for debugging linker issues in this context?
### Triage
- needs-triage
Any help would be greatly appreciated. Thanks!
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